Dear Ellison,
thanks a lot for your reply. Your explanation makes things much clearer.
Sincerely,
f.
On 24 January 2013 05:58, S Ellison wrote:
>
>
> On 23 Jan 2013, at 21:36, "Francesco Sarracino"
> wrote:
>
> > what I meant refers to the fact that I've read on "an R and
> > S-plus co
On 23 Jan 2013, at 21:36, "Francesco Sarracino" wrote:
> what I meant refers to the fact that I've read on "an R and
> S-plus companion to applied regression" about methods to alter the encoding
> of factors when using contrasts in regressions. These are options (for
> contrasts) that ca
Thank you all for your replies. Let me try to explain my point: first of
all, let me clarify that I didn't mean to criticize anyone (or anything).
Secondly, what I meant refers to the fact that I've read on "an R and
S-plus companion to applied regression" about methods to alter the encoding
of f
Given that your labels are "no" and "yes", what do you expect R to
do? To quote a well-known fortune, "R is lacking a mind_read() function!"
cheers,
Rolf Turner
On 01/23/2013 10:58 PM, Francesco Sarracino wrote:
Thanks,
this works! but I am surprised that R has such a strange beh
gt; From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf
> Of Francesco Sarracino
> Sent: Wednesday, January 23, 2013 1:59 AM
> To: D. Rizopoulos
> Cc: R help
> Subject: Re: [R] problems with coercing a factor to be numeric
>
> Thanks,
On Jan 23, 2013, at 1:58 AM, Francesco Sarracino wrote:
Thanks,
this works! but I am surprised that R has such a strange behavior
and that
there is no way to control it.
BTW, also as.integer(pp)-1 works!
Still, it doesn't look to me as a first best.
At any rate, thanks a lot for your help.
Thanks,
this works! but I am surprised that R has such a strange behavior and that
there is no way to control it.
BTW, also as.integer(pp)-1 works!
Still, it doesn't look to me as a first best.
At any rate, thanks a lot for your help.
f.
On 23 January 2013 10:53, D. Rizopoulos wrote:
> check al
check also
pp <- rep(0:1, 10)
pp <- factor(pp, levels=(0:1), labels=c("no","yes"))
unclass(pp)
unclass(pp) - 1
Best,
Dimitris
On 1/23/2013 10:48 AM, Francesco Sarracino wrote:
> Dear Dimitris,
>
> thanks for your quick reply. I've tried the solutions proposed in 7.10
> How do I convert factor
Dear Dimitris,
thanks for your quick reply. I've tried the solutions proposed in 7.10 How
do I convert factors to numeric?
as.numeric(as.character(pp))
and
as.numeric(levels(pp))[as.integer(pp)]
However, whatever I do, I get "Warning message: NAs introduced by coercion"
and the output is a vecto
Check R FAQ 7.10: How do I convert factors to numeric?
I hope it helps.
Best,
Dimitris
On 1/23/2013 10:33 AM, Francesco Sarracino wrote:
> Dear R listers,
>
> I am trying to compute the mean of a dummy variable that is encoded as a
> factor. However, even though the levels of my factor are 0 -
Dear R listers,
I am trying to compute the mean of a dummy variable that is encoded as a
factor. However, even though the levels of my factor are 0 - 1, when I
compute the mean (after coercing the factor to be
numeric), R changes 0 into 1 and 1 into yes, thus altering my expected
result.
Please,
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